To find the version and patch level number of a FreeBSD system, you can use the following command:
freebsd-version -ku
This will print the version and patch level of the FreeBSD operating system.
For example, if your system is running FreeBSD 12.2, the output will be:
12.2-RELEASE
If your system has any patches installed, the patch level number will be included in the output. For example:
12.2-RELEASE-p4
This indicates that the system has 4 patches installed.